Sample Polygons
Creates an equal sample of n for each polygon in an sp Polygon class object
sample.poly(x, n = 10, type = "random", ...)
x |
sp class SpatialPolygons or SpatialPolygonsDataFrame object |
n |
Number of random samples |
type |
Type of sample with options for: "random", "regular", "stratified", "nonaligned", "hexagonal", "clustered", "Fibonacci". See "spsample" for details. |
... |
Additional arguments passed to spsample |
sp SpatialPointsDataFrame object
Jeffrey S. Evans <jeffrey_evans@tnc.org>
library(raster)
library(sp)
p <- raster(nrow=10, ncol=10)
p[] <- runif(ncell(p)) * 10
p <- rasterToPolygons(p, fun=function(x){x > 9})
s <- sample.poly(p, n = 5, type = "random")
plot(p)
plot(s, pch = 20, add = TRUE)
box()
title("Random sample (n=5) for each polygon")Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.